Stacks (STX): From Reg A+ Pioneer to Bitcoin Layer 2

The First SEC-Qualified Token Offering

In July 2019, the project formerly known as Blockstack achieved a watershed moment in the cryptocurrency industry. It became the first blockchain company to conduct a digital token offering qualified by the U.S. Securities and Exchange Commission (SEC) under the Regulation A+ framework.

Regulation A+, often described as a “mini-IPO,” allows smaller companies to raise capital from the general public, not just wealthy accredited investors. By painstakingly working with regulators rather than circumventing them, Blockstack successfully raised approximately $23 million. This event set a critical precedent, proving that it was possible to distribute digital assets in full compliance with U.S. federal securities laws.

Evolution: From Blockstack to Stacks

Following the successful capital raise, the ecosystem underwent a significant transformation. In 2020, the core development company rebranded from Blockstack PBC to Hiro Systems PBC to differentiate the corporate entity from the open-source network. The network itself adopted the name Stacks.

This separation was part of a larger legal strategy. In January 2021, coinciding with the launch of the Stacks 2.0 mainnet, Hiro Systems filed an exit report with the SEC. They declared that the Stacks network had become “sufficiently decentralized,” meaning it was no longer dependent on the managerial efforts of a single entity. Consequently, the company announced it would no longer treat the Stacks token as a security, arguing it had transitioned into a user-owned utility commodity.

Technical Innovation: Proof of Transfer (PoX)

While its regulatory history is unique, the project’s technical architecture is equally distinct. Stacks introduced a novel consensus mechanism called Proof of Transfer (PoX). Unlike Proof of Stake (where users lock the native token to secure the chain), PoX connects Stacks directly to Bitcoin.

In this system, Stacks miners spend Bitcoin (BTC) to mine new Stacks (STX) tokens. The Bitcoin spent by miners is then distributed as a reward to STX holders who participate in consensus (a process known as “Stacking”). This creates a native Bitcoin yield for STX holders, making it one of the few ways to earn BTC rewards without lending funds to a centralized intermediary.

The Bitcoin Layer 2

Today, Stacks is recognized as the leading Layer 2 solution for Bitcoin. While Bitcoin is the world’s most secure and decentralized store of value, its scripting language is intentionally limited, making complex applications difficult to build.

Stacks solves this “Bitcoin Write Problem” by enabling fully expressive smart contracts and decentralized applications (dApps) to settle their transactions on the Bitcoin blockchain. This unlocks trillions of dollars in dormant Bitcoin capital for use in decentralized finance (DeFi), NFTs, and other web3 applications.

The Nakamoto Upgrade

In 2024, the network began rolling out the “Nakamoto” upgrade, a major technical overhaul designed to address speed limitations. Prior to this, Stacks blocks were tied to Bitcoin block times (roughly 10 minutes). The upgrade decouples block production, allowing for transaction speeds of around 5 seconds while maintaining Bitcoin’s finality security.

Additionally, the upgrade introduces sBTC, a trustless, decentralized two-way peg. This allows users to move Bitcoin in and out of the Stacks layer without relying on a centralized custodian or a federated multisig wallet, further cementing Stacks’ position as the premier scaling layer for the Bitcoin economy.

Founders and Legacy

The project was originally co-founded by Princeton computer scientists Muneeb Ali and Ryan Shea. While Shea departed in 2018 to pursue other ventures, Muneeb Ali remains a central figure in the ecosystem, currently serving as the CEO of Trust Machines, an entity dedicated to building the largest ecosystem of Bitcoin applications.